Kinetics of CO2 adsorption on ball-type dicopper phthalocyanine thin film

Altındal, Ahmet; Kurt, Özgür; Şengül, Abdurrahman; Bekâroĝlu, Özer

doi:10.1016/j.snb.2014.05.107

Cited by 26 publications

(9 citation statements)

References 40 publications

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“…where q e and q are the adsorption capacity at equilibrium (mg/g) and the adsorption capacity (mg/g) at time t, respectively. n is the number of sites on the surface occupied by an adsorbed gas and is equal to two for second-order reaction kinetics (Altindal et al, 2014), k R is the kinetic rate constant (1/h), and t is the time (h).…”

Section: Mathematical Modelsmentioning

confidence: 99%

Siloxane removal for biogas purification by low cost mineral adsorbent

Pioquinto-García

Rodríguez

Martínez

et al. 2021

Journal of Cleaner Production

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The potential use of raw and expanded perlite as low-cost adsorbents for biogas purification has been investigated. The thermal expansion of perlite causes a reduction in the density of silanol groups from 2515.43 to 653.75 OH/nm 2 ; in contrast, the specific surface area of perlite increased two-fold due to the thermal expansion. To determine the equilibrium adsorption capacity and the adsorption kinetics batch experiments were conducted. The adsorption capacities are in the following order: activated carbon (6.8 mg/g) > silica gel (6.6 mg/g) > expanded perlite (5.81 mg/g) > raw perlite (5.6 mg/g) when compared at the same experimental conditions. The equilibrium adsorption data showed that perlite can be used to reduce the octamethylcyclotetrasiloxane concentration below 28 mg/m 3 , as recommended by leading manufacturers. The adsorption kinetics of octamethylcyclotetrasiloxane onto raw and expanded perlite followed the Linear-Driving Force model suggesting that the mass transfer is the ratecontrolling step. In addition to its low cost, expanded perlite has the advantage of requiring lower desorption temperature (200 ºC) for regeneration in comparison to the reported values for activated carbon (> 400 ºC) and fast desorption kinetics (20 min), which could contribute to a cleaner production of biogas.

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Section: Mathematical Modelsmentioning

confidence: 99%

Siloxane removal for biogas purification by low cost mineral adsorbent

Pioquinto-García

Rodríguez

Martínez

et al. 2021

Journal of Cleaner Production

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“…When compared with inorganic based sensors, molecular semiconductor based sensors have several advantages. Unique physical and chemical properties of Pcs make them ideal candidates for sensing applications [23][24][25]. Some physical, photophysical and photochemical of 2,6-dimethoxyphenoxy substituted metal-free and metallophthalocyanines (indium(III) and zinc(II) Pcs) were investigated by our group [26].…”

Section: Introductionmentioning

confidence: 99%

Toluene vapor sensing characteristics of novel copper(II), indium(III), mono-lutetium(III) and tin(IV) phthalocyanines substituted with 2,6-dimethoxyphenoxy bioactive moieties

Pişkin

Can

Odabaş

et al. 2018

J. Porphyrins Phthalocyanines

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This study presents the synthesis, characterization and toluene sensing properties of copper(II), indium(III) acetate, mono-lutetium(III) acetate and tin(IV) phthalocyanines substituted with 2,6-dimethoxyphenol bioactive groups at the peripheral and non-peripheral positions. The effects of the substituent's position on the toluene vapor detection capabilities of these compounds were investigated. Adsorption data were analyzed by using first-order and Elovich equations in order to investigate the adsorption kinetics. It was found that the kinetics of the toluene adsorption strongly depends on the position of the substituent groups. Our results showed that the Elovich equation fits the experimental data well for non-peripherally substituted Pc based sensors, while the pseudo first-order model best describes the adsorption data for peripheral substituted Pc based sensors. Some physical, photophysical and photochemical of 2,6-dimethoxyphenoxy substituted metal-free and metallophthalocyanines (indium(III) and zinc(II) Pcs) were investigated by our group [26]. We wondered how copper(II), indium(III), mono-lutetium(III) and tin(IV) Pcs substituted with 2,6-dimethoxyphenoxy bioactive moieties affect the physical, electronic and toluene sensing properties. Hence, highly soluble peripherally and non-peripherally substituted Cu(II), In(III), Lu(III) and Sn(IV) Pcs with 2,6-dimethoxyphenoxy were also synthesized (Scheme 1), and the effects of the position of the substituents and the variety of central metal ions on the their spectroscopic and toluene vapors sensing properties were investigated in this study. KEYWORDS EXPERIMENTAL Materials and Equipment2,6-Dimethoxy-phenoxy substituted phthalonitriles (1 and 2) were obtained by the reaction of 2,6-dimethoxy phenol with 3-nitrophthalonitrile or 4-nitrophthalonitrile through base catalyzed nucleophilic aromatic displacement reaction [26]. All other starting materials and solvents used were obtained commercially. All reactions were carried out under dry nitrogen atmosphere. The novel Pcs (3-10) were successively cleaned by washing with hot acetic acid-water solution by volume 7/3, water, ethanol and acetonitrile in the Soxhlet apparatus. Column chromatography was performed on silica gel 60 for a proper purification of the raw compounds. The purity of the products was tested in each step by thin layer chromotography (Silicagel F-254 coated TLC plate). Melting points of the Pc compounds were found to be higher than 300 °C. IR Spectra and electronic spectra were recorded on a Shimadzu FTIR-8300 (ATR) and a Shimadzu UV-1601 spectrophotometer, respectively. Elemental analyses were performed by the Instrumental Analysis Laboratory of TUBITAK-Ankara. Mass spectra were acquired on a Microflex III MALDI-TOF mass spectrometer (Bruker Daltonics, Germany) equipped with a nitrogen UV-Laser operating at 337 nm in reflectron mode with an average of 50 shots. SynthesisGeneral procedure for the synthesis of metallophth alocyanines (3-10).

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“…In the present work, in order to investigate its suitability for a particular device application, we focused on the study of conduction mechanism and dielectric relaxation phenomena in thin film of novel ball-type four t-butylcalix Shan Do and Jen Chen, (2007) arene bridged binuclear zinc(II) phthalocyanine (2). IS was employed to investigate the charge transport and dielectric relaxation in the film.…”

Section: Introductionmentioning

confidence: 99%

“…From the point of view of cost, structural flexibility, toxicity, thermal and chemical stability as well as high optical absorption in the visible region ascribe to phthalocyanine (Pc) compounds and their derivatives a unique position among the many other organic materials. Pcs, a wellknown multifunctional organic material for various applications including electronics, optoelectronics, chemical sensor and solar cells (Kimura et al 1997, Bao et al 1996, Pandey et al 2012, Shan Do and Jen Chen, 2007, Altındal et al 2014). In many applications of phthalocyanines in the thin film form, the determination of the charge transport mechanism and dielectric relaxation process is important to evaluate the usability of these compounds for any specific application.…”

Section: Introductionmentioning

confidence: 99%

Ftalosiyanin İnce Filmde Empedans Spektroskopi Ve Dielektrik Durulma

Can¹,

Altındal²

2017

Uludağ University Journal of the Faculty of Engineering

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Dielectric relaxation behavior of spin coated thin film of novel ball-type binuclear zinc(II) phthalocyanine were studied using impedance spectroscopy technique over a frequency range of 5-13x10 6 Hz and temperatures (298 -468 K). Simulation of the obtained impedance data indicated that the dielectric behaviour of the system can be modeled by a parallel RC electrical equivalent circuit. A frequency dependence in the form of ω m , where the index m is found strongly temperature dependent, was observed for the ac conductivity σ ac . Ac conductivity data were analyzed in terms two different models. The observed temperature dependence of the m indicate that the ac charge transport in Pc film take place via hopping process.Keywords: Phthalocyanine, Impedance, Relaxation, Ac conductivity, CBH model Ftalosiyanin İnce Filmde Empedans Spektroskopi ve Dielektrik DurulmaÖz: Döndürerek kaplama yöntemiyle hazırlanan top tipi çinko (II) ftalosiyanin ince filmlerin dielektrik durulma davranışları 5 Hz. ile 13x10 6 Hz frekans aralığında sıcaklığa bağlı olarak (298 K -468 K sıcaklık aralığında) empedans spektroskopi yöntemiyle incelenmiştir. Elde edilen verilerin modellenmesinde sistemin dielektrik davranışının paralel RC eşdeğer devre ile temsil edilebileceği görülmüştür. Filmlerde ac iletkenliğin frekansa bağlılığının ω m şeklinde olduğu ve frekansın üssü olan m parametresinin kuvvetle sıcaklığa bağlı olduğu gözlemlenmiştir. Deneysel olarak elde edilen ac iletkenlik verileri iki farklı model kullanılarak analiz edilmiştir. Frekansın üssü olan m parametresinin sıcaklığa bağlılığının incelenmesinde çinko (II) ftalosiyanin ince filmlerde ac yük iletiminin hoplama mekanizması sayesinde gerçekleştiği sonucuna varılmıştır.

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Kinetics of CO2 adsorption on ball-type dicopper phthalocyanine thin film

Cited by 26 publications

References 40 publications

Siloxane removal for biogas purification by low cost mineral adsorbent

Siloxane removal for biogas purification by low cost mineral adsorbent

Toluene vapor sensing characteristics of novel copper(II), indium(III), mono-lutetium(III) and tin(IV) phthalocyanines substituted with 2,6-dimethoxyphenoxy bioactive moieties

Ftalosiyanin İnce Filmde Empedans Spektroskopi Ve Dielektrik Durulma

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